Home / 923,378.19-1,274,326.08-515,560.20

Finding the Fourth Proportional to 923,378.19, 1,274,326.08 and 515,560.20

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Solution

The fourth proportional to 923,378.19, 1,274,326.08 and 515,560.20 is: 711,508.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    923,378.19 : 1,274,326.08 = 515,560.20 : x
  2. Step 2: Convert to fraction form
    923,378.19/1,274,326.08 = 515,560.20/x
  3. Step 3: Cross multiply
    923,378.19x = 1,274,326.08 × 515,560.20
  4. Step 4: Simplify right side
    923,378.19x = 656,991,808,670.02
  5. Step 5: Solve for x
    x = 656,991,808,670.02/923,378.19
  6. Step 6: Final answer
    x = 711,508.91

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Half scale
Find fourth proportional to 1,846,756.38, 2,548,652.16 and 1,031,120.40
Double scale
Find fourth proportional to 923,379.19, 1,274,327.46 and 515,561.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.